Yes it would be good to practice filling out the forms. Actually by hand. Here is the 1040 and schedules 1-3. But she probably won't need the schedules.
Here is the IRS 2021 Form 1040https://www.irs.gov/pub/irs-pdf/f1040.pdf
And 2021 Instructionshttps://www.irs.gov/pub/irs-pdf/i1040gi.pdf
2021 Tax and EIC Tableshttps://www.irs.gov/pub/irs-pdf/i1040tt.pdf
Sch 1 : https://www.irs.gov/pub/irs-pdf/f1040s1.pdfSch 2 : https://www.irs.gov/pub/irs-pdf/f1040s2.pdfSch 3 : https://www.irs.gov/pub/irs-pdf/f1040s3.pdf
