Hello All, I have a query is it possible to add textbox or a select field in a list suitelet? like filter option in record list?

dont think so, lists are more row/columns only

We want user to be able to change search parameters on their own. Is there any way we can do that? I was thinking of adding a select field and adding field change script with it but it seems that's not possible.

you can have a list type sublist to display your search results

Yeah I just got the same Idea. Thanks, will look into it.

A simple approach is to have a set of filters on the GET and then process those and present the data on the POST. It's less "dynamic" but functional and pretty easy to code. You can have a select field on your form with the list it just needs a little extra work to capture the selection and put the values back on the form at the time you reload the page.

@Nelli It seems like the best practice would be the GET and POST process. I tried the form and SubList method as well it was not the best way to solve the problem I was having. Thanks a lot for your help.