The TaxSlayer Pro desktop program supports the following Maryland Business forms.
| MD Form 500 | Corporation Income Tax Return |
| MD Form 500CR | Business Income Tax Credits |
| MD Form 500DM | Decoupling Modification |
| MD Form 500D | Corporation Declaration of Estimated Income Tax |
| MD Form 500E | Application for Extension of Time to File Corporation Income Tax Return |
| MD Form 500UP | Underpayment of Estimated Income Tax by Corporations and Pass-Through Entities |
| MD Form 502CR | Income Tax Credits for Individuals |
| MD Form 502S | Maryland Historic Revitalization Tax Credit |
| MD Form 504 | Fiduciary Income Tax Return |
| MD Form 504 Sch. A | Fiduciary Income Tax Return Schedule A |
| MD Form 504CR | Business Income Tax Credits for Fiduciaries |
| MD Form 504D | Fiduciary Declaration of Estimated Income Tax |
| MD Form 504E | Application for Extension to File Fiduciary Income Tax Return |
| MD Form 504NBD | Nonresident Beneficiary Deduction Summary Sheet |
| MD Form 504NR | Fiduciary Nonresident Income Tax Calculation |
| MD Form 504UP | Underpayment of Estimated Income Tax by Fiduciaries |
| MD Schedule K-1 (504) | Fiduciary Beneficiary's Information |
| MD Form 510 | Pass-Through Entity Income Tax Return |
| MD Form 510 Sch. B | Pass-Through Entity Income Tax Return Members' Information |
| MD Form 511 | Pass-Through Entity Election Income Tax Return |
| MD Form 511 Sch. B | Pass-Through Entity Election Income Tax Return Members' Information |
| MD Form 510/511D | Pass-Through Entity Declaration of Estimated Income Tax |
| MD Form 510/511E | Application for Extension to File Pass-Through Entity Income Tax Return |
| MD Schedule K-1 (510/511) |
Pass-Through Entity Member's Information |
| MD Form EL101B | E-File Declaration for Business & Fiduciary Electronic Filing |
| MD Form EL102B | Income Tax Payment Voucher for Business & Fiduciary Electronic Filers |
| MD Form 1 | Annual Report and Business Personal Property Return |
Additional Information: