Does she has a passport and if yes from which country?

What is the reason why she want to stay long time in Thailand?

Just based on being a daughter who wants to stay 3 months it is impossible to give any correct visa information.

Welcome in the club, somehow some people think that discussion is not allowed, advice should be only what they want to hear and Immigration should adjust the law in Thailand on demands on the fist of a few idiots.

It is a shame such people do walk around without a leash and are free to use Social Media.

Take care, they are only though bullies using a keyboard/

@Rudy ******

The address where you are going to stay, being homeless and sleep on the street is not allowed to tourists.

As you have to show the tickets and the reasons of multiple visits, you can use the invitation letter for the same periods of time spending in Thailand.

@Tobias **********

I see you want to fly to KL, take a look at the website of the Thai Embassy in KL.

All the needed information is there, even a link to an appointment site to apply for a visa and a link to an appointment site to pick up the visa.

@Tobias **********

I guess you need another type of visa but do not like the requirements.

3. It might be or it might be a pain in the ass.

It all depends IF your local Immigration Office is allowed to perform this conversion into a Non Immigrant O visa, if not if means travel and book hotels to stay near an Office which is allowed.

Most easy option is to provide the documents and get the visa before travel, not sure why you choose for retirement as you also have the option of being married with a Thai Citizen.

And based on marriage has less financial requirements if you apply for the 1 year Extension of Stay.

You apply at your local Immigration Office, just go there and ask the hand out with requirements. Copy them and tick the list, when done visit again to apply.

Check your passport and tell us if you are on the initial 90 day which you got with the visa

OR

Do you have a stamp in the passport with the text: "Extension of Stay permitted up to xx/xx/xx

Two total different things wtih total different ways to handle if you stop working.

Not an IT expert, but could it be that user name and password are saved in your browser and automaticly filled in. Try to clear those savings and try again.