Version: 2.0.0

Update

Use this endpoint to update the information on existing Maryland Withholding Reports that are already created for a specific employer (payer).

You cannot update a return once it has been transmitted.

PUT statefilings/MDMW506WH/update

Run in Postman

Request Body

Field	Type	Description
SubmissionId	Guid	Unique identifier created by TaxBandits for each submission.
StateWHRecords	Object[]	Object to identify the records.
SequenceId	String	A unique identifier for this record. Size Range: 1–50
ReturnHeader	Object	Contains business information.
TaxYear	String	The tax year for which the Form MW506Q is to be filed. Allowed values Allowed values: "2025", "2026"
Qtr	String	The quarter for which the Form MW506Q is to be filed. Allowed values Allowed values: "Q1", "Q2", "Q3", "Q4"
Business	Object	Object to identify the Business Details.
BusinessId	Guid	Optional. Use the unique Business ID (Generated by TaxBandits) that you received in the response of the Business CREATE Endpoint. If you do not have a Business ID, ignore the field. By giving the Business ID, you do not have to provide all the business information again.
PayerRef	String	Optional. Your unique identifier for the payer. Can replace BusinessId in future requests. Size Range: 50
IsDefaultBusiness	Boolean	When set to TRUE, this business will be set as the default across requests that do not specify a business.
TINDetails	Object	TIN information for the business.
Format	String	Specifies how the TIN is passed. Allowed values Allowed values: "PLAIN_TIN" — Pass TIN directly.
TINType	String	Specify the TIN type of the business. Allowed values Allowed values: "EIN"
TIN	String	The TIN value according to the Format selected.
BusinessNm	String	Legal name of the business. Required when TINType is EIN. Size Range: 75
NameCtrl	String	Name control of the business as registered with the IRS. Size Range: 4
DBADetails	Object	Optional. DBA (Doing Business As) information.
DBANm	String	Name of the DBA. Size Range: 75
DBARef	String	Unique identifier for the DBA. Size Range: 1-50
DBAId	Guid	TaxBandits-generated DBA identifier.
Address	Object	Address information of the DBA.
Address1	String	Street address or PO Box. Size Range: 46
Address2	String	Optional. Suite or apartment number. Size Range: 46
City	String	DBA's city. Size Range: 50
ProvinceOrState	String	DBA's province or state name. Allowed values When the country code is US: "AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", "DC", "FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY", "AS", "FM", "GU", "MH", "MP", "PW", "PR", "VI", "AA", "AE", "AP" When the country code is CA: "AB", "BC", "MB", "NB", "NL", "NT", "NS", "NU", "ON", "PE", "QC", "SK", "YT" Note: The size range is set to 50 for all countries except the United States and Canada.
ZipCd	String	DBA's ZIP code. Size Range: 5-16
Country	String	DBA's 2-character country code. Allowed values Allowed values: "US", "AF", "AX", "AL", "AG", "AQ", "AN", "AO", "AV", "AY", "AC", "AR", "AM", "AA", "AT", "AS", "AU", "AJ", "BF", "BA", "FQ", "BG", "BB", "BO", "BE", "BH", "BN", "BD", "BT", "BL", "BK", "BC", "BV", "BR", "IO", "VI", "BX", "BU", "UV", "BM", "BY", "CB", "CM", "CA", "CV", "CJ", "CT", "CD", "CI", "CH", "KT", "IP", "CK", "CO", "CN", "CF", "CG", "CW", "CR", "CS", "IV", "HR", "CU", "UC", "CY", "EZ", "DA", "DX", "DJ", "DO", "DR", "TT", "EC", "EG", "ES", "EK", "ER", "EN", "ET", "FK", "FO", "FM", "FJ", "FI", "FR", "FP", "FS", "GB", "GA", "GG", "GM", "GH", "GI", "GR", "GL", "GJ", "GQ", "GT", "GK", "GV", "PU", "GY", "HA", "HM", "VT", "HO", "HK", "HQ", "HU", "IC", "IN", "ID", "IR", "IZ", "EI", "IS", "IT", "JM", "JN", "JA", "DQ", "JE", "JQ", "JO", "KZ", "KE", "KQ", "KR", "KN", "KS", "KV", "KU", "KG", "LA", "LG", "LE", "LT", "LI", "LY", "LS", "LH", "LU", "MC", "MK", "MA", "MI", "MY", "MV", "ML", "MT", "IM", "RM", "MR", "MP", "MX", "MQ", "MD", "MN", "MG", "MJ", "MH", "MO", "MZ", "WA", "NR", "BQ", "NP", "NL", "NC", "NZ", "NU", "NG", "NI", "NE", "NF", "CQ", "NO", "MU", "OC", "PK", "PS", "LQ", "PM", "PP", "PF", "PA", "PE", "RP", "PC", "PL", "PO", "RQ", "QA", "RO", "RS", "RW", "TB", "RN", "WS", "SM", "TP", "SA", "SG", "RI", "SE", "SL", "SN", "NN", "LO", "SI", "BP", "SO", "SF", "SX", "OD", "SP", "PG", "CE", "SH", "SC", "ST", "SB", "VC", "SU", "NS", "SV", "WZ", "SW", "SZ", "SY", "TW", "TI", "TZ", "TH", "TO", "TL", "TN", "TD", "TS", "TU", "TX", "TK", "TV", "UG", "UP", "AE", "UK", "UY", "UZ", "NH", "VE", "VM", "VQ", "WQ", "WF", "WI", "YM", "ZA", "ZI"
Address	Object	Primary address of the business.
Address1	String	Street address or PO Box of the business. Size Range: 46
Address2	String	Optional. Suite or apartment number of the business. Size Range: 46
City	String	City of the business. Size Range: 50
ProvinceOrState	String	Province or state name of the business. Allowed values When the country code is US: "AL", "AK", "AZ", "AR", "CA", "CO", "CT", "DE", "DC", "FL", "GA", "HI", "ID", "IL", "IN", "IA", "KS", "KY", "LA", "ME", "MD", "MA", "MI", "MN", "MS", "MO", "MT", "NE", "NV", "NH", "NJ", "NM", "NY", "NC", "ND", "OH", "OK", "OR", "PA", "RI", "SC", "SD", "TN", "TX", "UT", "VT", "VA", "WA", "WV", "WI", "WY", "AS", "FM", "GU", "MH", "MP", "PW", "PR", "VI", "AA", "AE", "AP" When the country code is CA: "AB", "BC", "MB", "NB", "NL", "NT", "NS", "NU", "ON", "PE", "QC", "SK", "YT" Note: The size range is set to 50 for all countries except the United States and Canada.
ZipCd	String	ZIP code of the business. Size Range: 5-16
Country	String	2-character country code of the business. Allowed values Allowed values: "US", "AF", "AX", "AL", "AG", "AQ", "AN", "AO", "AV", "AY", "AC", "AR", "AM", "AA", "AT", "AS", "AU", "AJ", "BF", "BA", "FQ", "BG", "BB", "BO", "BE", "BH", "BN", "BD", "BT", "BL", "BK", "BC", "BV", "BR", "IO", "VI", "BX", "BU", "UV", "BM", "BY", "CB", "CM", "CA", "CV", "CJ", "CT", "CD", "CI", "CH", "KT", "IP", "CK", "CO", "CN", "CF", "CG", "CW", "CR", "CS", "IV", "HR", "CU", "UC", "CY", "EZ", "DA", "DX", "DJ", "DO", "DR", "TT", "EC", "EG", "ES", "EK", "ER", "EN", "ET", "FK", "FO", "FM", "FJ", "FI", "FR", "FP", "FS", "GB", "GA", "GG", "GM", "GH", "GI", "GR", "GL", "GJ", "GQ", "GT", "GK", "GV", "PU", "GY", "HA", "HM", "VT", "HO", "HK", "HQ", "HU", "IC", "IN", "ID", "IR", "IZ", "EI", "IS", "IT", "JM", "JN", "JA", "DQ", "JE", "JQ", "JO", "KZ", "KE", "KQ", "KR", "KN", "KS", "KV", "KU", "KG", "LA", "LG", "LE", "LT", "LI", "LY", "LS", "LH", "LU", "MC", "MK", "MA", "MI", "MY", "MV", "ML", "MT", "IM", "RM", "MR", "MP", "MX", "MQ", "MD", "MN", "MG", "MJ", "MH", "MO", "MZ", "WA", "NR", "BQ", "NP", "NL", "NC", "NZ", "NU", "NG", "NI", "NE", "NF", "CQ", "NO", "MU", "OC", "PK", "PS", "LQ", "PM", "PP", "PF", "PA", "PE", "RP", "PC", "PL", "PO", "RQ", "QA", "RO", "RS", "RW", "TB", "RN", "WS", "SM", "TP", "SA", "SG", "RI", "SE", "SL", "SN", "NN", "LO", "SI", "BP", "SO", "SF", "SX", "OD", "SP", "PG", "CE", "SH", "SC", "ST", "SB", "VC", "SU", "NS", "SV", "WZ", "SW", "SZ", "SY", "TW", "TI", "TZ", "TH", "TO", "TL", "TN", "TD", "TS", "TU", "TX", "TK", "TV", "UG", "UP", "AE", "UK", "UY", "UZ", "NH", "VE", "VM", "VQ", "WQ", "WF", "WI", "YM", "ZA", "ZI"
ContactDetails	Object	Details of the person the IRS can contact regarding the given business.
FirstNm	String	First name of the contact person. Size Range: 20
MiddleNm	String	Optional. Middle name of the contact person. Size Range: 20
LastNm	String	Last name of the contact person. Size Range: 20
Suffix	String	Optional. The suffix of the contact person. Allowed values Allowed values: "Jr", "Sr", "I", "II", "III", "IV", "V", "VI", "VII"
Phone	String	Optional. Phone number of the contact person. Size Range: 10 digits
PhoneExtn	String	Optional. Phone extension number. Size Range: 5
Email	String	Optional. Email address of the contact person. Size Range: ..100
Fax	String	Optional. Fax number of the contact person. Size Range: 10 digits
BusinessType	String	Legal structure of the business. Allowed values Allowed values: "ESTE", "PART", "CORP", "EORG", "SPRO"
SigningAuthority	Object	Details of the person authorized to sign the return. Mandatory for 94x forms.
FirstNm	String	First name of the signatory. Size Range: 20
MiddleNm	String	Optional. Middle name of the signatory. Size Range: 20
LastNm	String	Last name of the signatory. Size Range: 20
Suffix	String	Optional. The suffix of the signatory. Allowed values Allowed values: "Jr", "Sr", "I", "II", "III", "IV", "V", "VI", "VII"
Phone	String	Optional. Phone number of the signatory Size Range: 10
PhoneExtn	String	Optional. Phone extension number of the signatory. Size Range: 5
BusinessMemberType	String	Optional. Title or role of the signatory. Allowed values Allowed values: "CORPORATESECRETARY", "SECRETARYTREASURER", "PARTNER", "GENERALPARTNER", "LIMITEDPARTNER", "LLCMEMBER", "MANAGINGMEMBER", "MANAGER", "TAXMATTERPARTNER", "PRESIDENT", "VICEPRESIDENT", "CORPORATETREASURER", "TREASURER", "ASSISTANTTREASURER", "CHIEFACCOUNTINGOFFICER", "CHIEFEXECUTIVEOFFICER", "CHIEFFINANCIALOFFICER", "TAXOFFICER", "CHIEFOPERATINGOFFICER", "CORPORATEOFFICER", "EXECUTIVEDIRECTOR", "DIRECTOR", "CHAIRMAN", "EXECUTIVEADMINISTRATOR", "RECEIVER", "PASTOR", "ASSISTANTTORELIGIOUSLEADER", "REVEREND", "PRIEST", "MINISTER", "RABBI", "LEADEROFRELIGIOUSORGANIZATION", "SECRETARY", "DIRECTOROFTAXATION", "DIRECTOROFPERSONNEL", "ADMINISTRATOR", "EXECUTOR", "TRUSTEE", "FIDUCIARY", "OWNER", "SOLEPROPRIETOR", "MEMBER", "SOLEMEMBER", "REPORTINGAGENT"
ReturnData	Object	Contains the return information.
MW506Q	Object	Identifies the Form MW506Q data.
WHIdNumber	String	Maryland withholding file number. Sample Format: XXXXXXXX Size Range: 8
IsZeroTaxWithheld	Boolean	When true, indicates that no tax is withheld in this quarter.
TotalTaxWithheld	Number	Total tax withheld from all sources for the filing period. Size Range: 0-999999999.99
TotalTaxPaid	Number	Total tax paid for the filing period. Size Range: 0-999999999.99

Response Body

Field	Type	Description
SubmissionId	Guid	Unique identifier for a submission.
SuccessRecords	Object[]	Provides detailed information about the success status of Form MW506Q records.
SequenceId	String	A unique reference ID for the submission that can be used to identify a particular record. The Sequence ID will be returned in the response for your reference.
BusinessId	Guid	Unique identifier for the business (payer) generated by TaxBandits.
PayerRef	String	Unique identifier for the business (payer) provided by you.
RecordId	Guid	A unique identifier generated by TaxBandits when a Form MW506Q return is created.
FormType	String	Type of form.
Status	String	Returns the record status.
StatusTs	String	Returns the date and time when the return was created.
Info	String	Provides additional information about the return.
Errors	Object[]	Displays error information related to the state returns of Form MW506Q.
Id	String	Returns the validation error ID.
Name	String	Name of the validation error.
ErrorRecords	Object[]	Provides detailed information about the error status of Form MW506Q records.
SequenceId	String	A unique reference ID for the submission that can be used to identify a particular record. The Sequence ID will be returned in the response for your reference.
RecordId	Guid	Unique identifier for the record.
Errors	Object[]	Displays detailed error information.
Id	String	Returns the validation error ID.
Name	String	Name of the validation error.
Message	String	Description of the validation error.

Request JSON

{
  "SubmissionId": "01a19c83-ddf6-7569-8b8a-8451a182ee0c",
  "StateWHRecords": [
      {
          "SequenceId": "01",
          "RecordId": "01a19c83-e0c1-727d-8fe5-24fd3c9acccd",
          "ReturnHeader": {
              "Qtr": "Q3",
              "TaxYear": "2026",
              "Business": {
                  "BusinessId": null,
                  "IsDefaultBusiness": true,
                  "TINDetails": {
                      "Format": "PLAIN_TIN",
                      "TINType": "EIN",
                      "TIN": "45-9800062"
                  },
                  "IndividualNm": {
                      "FirstNm": "James",
                      "MiddleNm": "A",
                      "LastNm": "Anderson",
                      "Suffix": "Jr"
                  },
                  "BusinessNm": "Snowdaze LLC",
                  "NameCtrl": "SNOW",
                  "DBADetails": {
                      "DBANm": "Iceberg Icecreams",
                      "DBARef": "DBA1001",
                      "DBAId": null,
                      "Address": {
                          "Address1": "123 Main St",
                          "Address2": "Suite 1001",
                          "City": "Rock Hill",
                          "ProvinceOrState": "SC",
                          "ZipCd": "29730",
                          "Country": "US"
                      }
                  },
                  "Address": {
                      "Address1": "123 Main St",
                      "Address2": "Suite 1001",
                      "City": "Rock Hill",
                      "ProvinceOrState": "SC",
                      "ZipCd": "29730",
                      "Country": "US"
                  },
                  "ContactDetails": {
                      "FirstNm": "James",
                      "MiddleNm": "A",
                      "LastNm": "Anderson",
                      "Suffix": "Jr",
                      "Phone": "8035551234",
                      "PhoneExtn": "101",
                      "Email": "contact@snowdaze.com",
                      "Fax": "8035555678"
                  },
                  "BusinessType": "ESTE",
                  "SigningAuthority": {
                      "FirstNm": "Ambrane",
                      "MiddleNm": "A",
                      "LastNm": "Cavil",
                      "Suffix": "Jr",
                      "Phone": "8035551000",
                      "PhoneExtn": "111",
                      "BusinessMemberType": "ADMINISTRATOR"
                  }
              }
          },
          "ReturnData": {
              "FormMW506Q": {
                  "WHIdNum": "23432345",
                  "IsZeroTaxWithheld": false,
                  "TotalTaxWithheld": "1000.00",
                  "TotalTaxPaid": "500.00"
              }
          }
      }
  ]
}

Response JSON

Success Response - This is a sample response for successful API requests.

{
  "SubmissionId": "01a19c83-ddf6-7569-8b8a-8451a182ee0c",
  "SuccessRecords": [
      {
          "SequenceId": "01",
          "BusinessId": "eaf3b6b4-c287-4047-9fce-b973c3d03e12",
          "PayerRef": null,
          "RecordId": "01a19c83-e0c1-727d-8fe5-24fd3c9acccd",
          "FormType": "MW506Q",
          "Status": "CREATED",
          "StatusTs": "2026-11-02 08:47:30 -05:00",
          "Info": null,
          "Errors": null
      }
  ],
  "ErrorRecords": null,
  "Errors": null
}

Unauthorized Response - You'll get the below response when your API requests don't contain valid authentication credentials.

{
  "Errors": [
      {
          "Id": "AUTH-100018",
          "Name": "Authorization",
          "Message": "JWT EXPIRED"
      }
  ]
}

W-9/W-8 Automation

1099 Automation

TIN Matching

W-2 Automation

941/940 Automation

1098-T Automation

ACA Automation

Extension Automation

1042-S Automation

Supported Forms

Gig Software

Payroll Software

Affiliate Software

HOA Software

Reselling Platform

HCM Providers

Property Management

Healthcare Market Research Platforms

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Request Body

Response Body

Request JSON​

Response JSON​

Request JSON

Response JSON