With DonorPerfect, you can record inkind donations and include them in your endofyear tax letters in a flash. Your donation receipt can be a mailed thankyou letter or an emailed acknowledgment.Select a process that works best for your nonprofit. Find information on annual reporting and filing using Form 990 returns, and applying and maintaining taxexempt status. Download Pennsylvania 501(c)(3) Donation Receipt template, modify and send for signing using BoloForms Signature. Nonprofits can apply for this exemption. How. 1. Complete an application. Other types of nonprofits apply using Form 1024. Fiscal sponsors permit your cause to receive taxdeductible donations and often handle administrative paperwork. Send out your consolidated, year-end receipt letters.