Also at the bottom of tax services page

A w-9 box with boxes next to it that link to: Charitable Donation Value guide http://www.smbiz.com/sbrl007.html, Compute your Withholding https://www.irs.gov/individuals/irs-withholding-calculator, Arizona Charitable Donation Tax Credits https://azdor.gov/tax-credits/contributions-qualifying-charitable-organizations, and Arizona Education Credits https://azdor.gov/tax-credits/credits-contributions-certified-school-tuition-organizations.

There is also a button that downloads a file for ‘Tax Preparation Organizer’.