You only need to attach federal forms in certain circumstances.
According to the Instructions for 2020 PIT-1,
Generally, you do not attach your federal return to your PIT-1.
If, however, you have a combined loss of over $40,000, from one or more of the following federal forms and schedules, attach to Form PIT-1, your federal Form 1040 or 1040SR and schedules showing the loss or losses taken on Form 1040 or 1040SR.
• Federal Schedules C or C-EZ for business income or loss;
• Federal Schedule D for capital gains or loss;
• Federal Schedule E for rental real estate, royalties, partnerships, S corporations, trusts, income;
• Federal Schedule F for farm income or loss; and
• Federal Form 4797, Other gains or losses.
