No, you cannot deduct your home office even if you use it exclusively for charitable and volunteer work. You may be able to deduct, as charitable donations, supplies you purchased while doing your charity and volunteer work.
Per IRS Home
Office Deduction , You can only deduct the home office if it is used for business.
To enter charitable donations, click on How do I enter my charitable donations in TurboTax?
For Business Start-Up Costs, see the answer to a previous post:
https://ttlc.intuit.com/questions/3083176-how-to-list-startup-costs-for-a-business
For additional information, click on https://turbotax.intuit.com/tax-tools/tax-tips/Small-Business-Taxes/Startup-Business-Tax-Tips/INF277...
