Downloads and Links Downloads Please contact us for engagement letters related to legal services or corporate accounting and tax 2024 Estate/Trust Tax Engagement Letter IRS Form W-9 Terms and Conditions Addendum 2024 Tax Client Procedures AnyDesk client for Windows 2024 Tax Organizer Dept of Commerce Mass Corporations Search 2024 Individual Tax Engagement Letter IRS Form W-4 AnyDesk client for Apple Links IRS Online IRS Account SSA Where's my refund? IRS Direct Pay (to pay individual taxes online) SBA Mass Tax Connect (to pay Mass tax online)