There is no one answer to that question, as every tax return is unique.
Every federal tax return must include both pages of Form 1040. Beyond that, it is data driven.
There are 6 new schedules that may be added to Form 1040, depending on the complexity of your return and the nature of your income and tax credits.
We still have the familiar Schedule A for itemized deductions, B for interest and dividends, C for self-employment income, D for capital gains (losses), E for rents, royalties, and pass through income, and F for farm income.
Finally, additional numbered forms of every type for depreciation, power of attorney, splitting a refund, etc.