You can wait to file your return until the recent changes are incorporated. HOWEVER, you should definitely pay what you owe by April 15 (if not sooner). Otherwise you will be facing interest and late-payment charges (even if the filing deadline is extended)/
To make a payment on the IRS website please click on this link: Paying Your Taxes
If you make a payment online, be sure to include the payment in your return in the Deductions & Credits screen, under Estimates and Other Taxes Paid. Enter the payment under Estimated Tax Payments.
