The Tax Cuts and Jobs Act changes the treatment of alimony paid and received.
Through December 31, 2018
Individuals can deduct an amount equal to alimony or separate maintenance payments paid during the year. This deduction is above the line; it reduces AGI. Also, alimony payments received during the year are includible in the gross income of the recipient. These rules do not apply to child support payments.
Effective for tax years beginning after December 31, 2018
In general, for divorce or separation instruments executed after December 31, 2018, the deduction for payment of alimony is disallowed and the inclusion in gross income for receipt of alimony payments will not apply.
There is a special rule for any divorce or separation agreement that is in effect before December 22, 2017 (date of enactment of the 2017 Tax Cuts and Jobs Act), that is executed after December 31, 2018, or executed on or before December 31, 2018, and modified after December 31, 2018, if the modification expressly provides that the amendments made by the 2017 Tax Cuts and Jobs Act apply, then the rules of the new tax law apply. It is recommended that you also consult with your attorney when dealing with divorce issues.