any legitimate donation to a 503C ( charitable deduction) is tax deductible . That includes mileage to work at the charity site etc. If the organization doesn't give a tax receipt which all 503C's are required to do, you can take up to $500.00 a year off your taxes without receipts. You have to list what you donated and the value however less than $500.00 a year total deductions on a 1044 don't require a receipt.
If you are making a quilt specifically, keep sales receipts for materials etc. for reporting purposes.