Part-year residency and DC retail tax considerations
If you move into or out of D.C. during the tax year, you may be a part-year resident, affecting your DC state tax obligations. Part-year residents are taxed on all income earned while resident, plus D.C.-sourced income during non-residency. This impacts not only income tax for Washington DC but potentially other obligations like DC sales tax. Keep detailed records of your move date and income sources. You'll likely need to file Form D-40, prorating income and deductions based on residency period. Remember, the DC sales tax rate and other taxes may apply differently to residents and non-residents.