For agreements executed on or after January 1, 2019, payors cannot deduct alimony payments from their taxable incomes. Filing for a divorce can cause some complexities in your tax situation.Then use your estimate to complete and give your employer a new Form W4. The IRS states that you can't deduct alimony or separate maintenance payments made under a divorce or separation agreement executed after 2018. Alimony payments must be reported on the payer's tax returns. They are subtracted from his or her income as a deduction on line 31 of Form 1040. Alimony may be tax-deductible, but only if you finalized your divorce or support agreement before January 1, 2019. You can deduct the amount of alimony payments even if you don't itemize deductions on your income tax return. If you are married, you are able to file a joint return with your spouse. Divorce in Texas can affect your income taxes.