If the IRS has adjusted your federal refund, they will send you a notice within a couple of weeks explaining what they did and what actions you need to take if you disagree with them. Make sure you are comparing the actual refund amount with the amount shown on line 20a of the 2018 form 1040. TurboTax has a summary sheet that shows the combined refunds from federal and state which would not be the correct amount for federal only. You get federal and state refunds separately. When you said you already paid your fees, I assume you mean that you did not choose to have them paid from your federal refund.
