It sounds like you entered category totals for asset (stocks, bonds,
mutual funds) sales instead of entering individual transactions. When
you do this, you have to mail a copy of your Form 1099-B with the
transaction details to the IRS. Form 8453 will identify it with your
tax return. Make sure you send a copy of your Form 1099-B. To print your Form 8453 and 8949 see the following FAQ:
https://ttlc.intuit.com/replies/3301977
