Turbotax says I need to file a form 8453 but says nothing about attaching 1040-B information even though the Form 8949 box is checked. I uploaded my 1040B information from Fidelity so, do I need to print and attach the Fidelity form 1040B or just the Form 8453. Because of an unusual situation in 2021 there are many pages to print and send. I don't want to do this unless I absolutely have to.
