When an eBay seller agrees to a return request, the time it takes to provide a return label will vary depending on the situation. Generally, if the seller agrees to a return request and has set up an automated return option, the system will automatically accept the buyer's return request and provide a return courier label. For example, in the US site, if the seller has set up automatic returns, when the buyer makes a return request, the system will automatically accept and provide a return label.

However, if the seller has not set up automated returns, they usually need to respond to the buyer's return request within 3 business days (US site) or 8 calendar days (UK site). In this case, the seller needs to proactively communicate with the buyer about the return shipping costs and provide a return label as soon as possible after agreeing to the return.

It should be noted that eBay's return policy may vary depending on the site and specific situation, so when processing a return request, it is recommended that sellers carefully read eBay's relevant guidelines and policies to ensure that the return process is handled correctly. If you need more specific help or guidance, you can contact eBay customer service for more detailed advice.