Where's my money I owe the irs and its been 18 days

if you owed the IRS they likely took any refund to apply against the debt to them.  

Per the IRS:

Can youI receive a tax refund if you are currently making payments under an installment agreement or payment plan for another federal tax period?
No, one of the conditions of your installment agreement is that the IRS will automatically apply any refund (or overpayment) due to you against taxes you owe. Because your refund isn't applied toward your regular monthly payment, continue making your installment agreement payments as scheduled.

If your refund exceeds your total balance due on all outstanding tax liabilities including accruals, you'll receive a refund of the excess unless you owe certain other past-due amounts, such as state income tax, child support, a student loan, or other federal nontax obligations which are offset against any refund. For more information on these non-IRS refund offsets, you can call the Bureau of the Fiscal Service (BFS) at 800-304-3107 (toll-free).