Home Tax Professionals Contact Information for Vendors and Developers Contact Information for Vendors and Developers Submitting Software Vendor Forms Prior to submitting paper forms for approval please complete the Comptroller of Maryland Substitute Paper Vendor Contact Information Form and return it to us at: mdsoftwaredevelopers@marylandtaxes.gov. eFile Program and Record Specifications Contact the eFile Help Desk at 410-260-7753 or by email at efil@marylandtaxes.gov. W-2/1099 Electronic & Magnetic Media Specifications Contact the Magnetic Media Unit at 410-260-7150 For additional information concerning W-2/1099 electronic and magnetic media see the section on magnetic media specifications. Paper Forms, Barcodes & Substitute Forms Contact the Forms Manager at 410-260-6395 or email mdsoftwaredevelopers@marylandtaxes.gov.