I am so sorry for your loss.
I would suggest you go through your return with a TurboTax Live expert or with a local tax preparer. They may find deductions that you missed.
You can set up an installment plan with the IRS. Hopefully a professional can help you reduce the amount that you owe.
If you owe $50,000 or less, the IRS will allow an installment agreement for up to 72 months.
If you owe more than $50,000, you must negotiate with the IRS. Do have a professional look at your return before you make any payment plan.
There may be some relief for you state taxes also. Each state has its own rules about payment.
