You can customize Drake Tax by going to Setup > Options and selecting from the options on the available tabs. Note that some options vary depending on the year of Drake Tax being used and your preparer security settings/rights.
Data Entry tab
Calculation & View/Print tab
Form & Schedule Options tab
Optional Documents tab
Optional Items on Return tab
Client Communications tab
Billing tab - see KB 13392
States tab
EF tab
Administrative Options tab (admin level logins only)