Correct spelling, explanation: the correct phrase is thanks in advance. The use of in advance indicates that you are expressing gratitude for something that is anticipated or expected in the future. On the other hand, thanks in advanced would be grammatically incorrect because advanced is not the correct term to convey the idea of something happening in the future in this context. Advanced typically refers to something that is ahead in time or development, but it doesn’t fit the meaning you intend in this expression.

Definition of thanks in advance:
Phrase, used to thank someone for a favor prior to that favor being performed
I’m looking forward to your feedback on the project proposal. Your insights are valuable, and thanks in advance for taking the time to review it.
Could you please send me the updated schedule at your earliest convenience? I appreciate your prompt attention to this matter, and thanks in advance for your cooperation.

Collocations with thanks in advance:
Some most commonly used collocations include:
1. E-mails: I appreciate your prompt response. Thanks in advance for your attention to this matter.
2. Requests: Could you please send me the details by the end of the day? Thanks in advance for your cooperation.
3. Feedback: I’m seeking feedback on the draft. Thanks in advance for sharing your thoughts and suggestions.
4. Help or support: If you could assist with the setup, that would be great. Thanks in advance for your help.

Incorrect spelling, explanation: the phrase thanks in advanced is incorrect because the correct term to use in this context is thanks in advance. The reason for this has to do with the proper use of prepositions. In advance is an idiom that means before a particular time or event. It is used to express gratitude for something that is expected to happen in the future. The word advanced, on the other hand, is an adjective that describes something that is ahead in time, progress, or development.