The TaxSlayer Pro desktop program supports the following Maryland Business forms.
| MD Form 500 | Corporation Income Tax Return |
| MD Form 500UP | Underpayment of Estimated Income tax by Corporations and Pass-Through Entities |
| MD Form 500CR | Business Income Tax Credits |
| MD Form 500DM | Decoupling Modification |
| MD Form 500X | Amended Corporation Income Tax Return |
| MD Form 500D | Corporation Declaration of Estimated Income Tax |
| MD Form 500E | Application for Extension of Time to File co |
| MD Form 500LU | Legislative Updates Addition/ Subtraction Modifications |
| MD Form 510 | Pass-Through Entity Income Tax Return |
| MD Form 511 | Pass-Through Entity Election Income Tax Return |
| MD Form 510 Sch. B | Pass-Through Entity Income Tax Return Members Information |
| MD Form 511 Sch. B | Pass-Through Entity Election Income Tax Return Members' Information |
| MD Form 510E | Application for Extension to File Pass-Through Entity Income Tax Return |
| MD Form 510D | Pass-Through Entity Declaration of Estimated Income Tax |
| MD Form 504 | Fiduciary Income Tax |
| MD Form 504 Sch. K | Fiduciary Beneficiary's Information |
| MD Form 504E | Application for Extension to File Fiduciary Income Tax Return |
| MD Form 504UP | Underpayment of Estimated Income Tax by Fiduciaries |
| MD Form 504NR | Fiduciary Nonresident Income Tax Calculation |
| MD Form 504D | Fiduciary Declaration of Estimated Income Tax |
| MD Form 502CR | Income Tax Credits for Individuals |
| MD Form 502S | Heritage Structure Rehabilitation Tax Credit |
| MD Form EL101B | E-File Declaration for Businesses Electronically Filing |
| MD Form EL102B | Income Tax Payment Voucher for Businesses Electronic Filing |
| MD Personal Property Return | Business Personal Property Tax Return |
| MD Sch. K-1 |
Pass-Through Entity Member's Information |
Additional Information: