It may be helpful to enter the investment sales reported on Form 1099-B manually in TurboTax as opposed to uploading the document.
You can enter the covered (cost basis reported to the IRS) sales in summary form, so you just make one entry for each transaction code (A,B, etc...) subtotal. That would reduce your input considerably. Look on your Form 8949 before you file your tax return to insure that the the capital gain agrees with the total reported on the Form 1099-B and you will be good.
You enter investment sales in the Wages and Income section of TurboTax, then Investments Sales, then Stocks, cryptocurrency, Mutual Funds, Bonds, etc...