I offer my completed proofreading work in three formats:
(a) most typically, writers prefer their proofreading in the form of Tracked Changes. They then can Accept Changes for each individual change that I have made in their manuscript, or they can Accept All Changes. With this option, you can get your proofed copy of your manuscript in either Microsoft Word (.docx) or Open Office 4.0 (.odt) format.
(b) I return a PDF file to the author that contains colored comments throughout their manuscript. These comments detail changes I recommend that they make. Authors that prefer this format like to see my reasoning for the proposed change. If they like the proposal, they Alt-Tab from the PDF file to their manuscript, which is open in their preferred word processor, and make the change. They then Alt-Tab back to the PDF file and continue reading my inline comments. The full sample proofread of the entire sci-fi novel "Simple" is done in this format.
(c) You third option is for me to simply make changes directly to your manuscript. No "Track Changes" enabled. The manuscript I return to you is, in my opinion, ready to be published. You can go ahead and upload it to Amazon for conversion to a Kindle e-book. With this option, you can get your proofed copy of your manuscript in either Microsoft Word (.docx) or Open Office 4.0 (.odt) format, but note that the Kindle Development Platform requires a Microsoft Word file to be uploaded.