what is the procedure for applying Singapore Tourist Visa ?

What is your nationality? US citizens do not need a visa in advance for Singapore.

YOU go to their official website and follow the rules for people from YOUR country for YOUR length of stay. I've been there several times and not needed to do anything in advance.

According to the Singapore tourist visa checklist, the following documents are essential and must be submitted for a visa application at the Embassy. Singapore visa application form is one of the important aspects of checklist which must be correctly filled on the Embassy website. The list of documents below is an evidence of the applicant’s financial circumstances and also strong ties in their home country that must be accurately provided to avoid any chances of visa refusals or Singapore visa interview at the Embassy.

Applicants Documents for Singapore Visa

Original Passport with validity of minimum 6 months from return date to India [Recent and previous if app​​licable]

Singapore visa application form

3 camera clicked coloured photographs [35mm* 45 mm, white background, matte finish, 70% face visible] for each applicant [Photos should not be used in any previous visa and should be a recent one]

Rental Agreement for applicant if passport is not from Telangana or Andhra Pradesh

Leave approval letter from company​ or email approval of leave

Employment proof [last 3 months Pay slips, company ID card copy]

Hotel bookings or accommodation covering the whole duration of the intended stay and flight tickets.

Inviter/Sponsor Documents for Singapore Visa if Invited

Passport first, last and visa pages.

Valid visa page or PR card copy

Employment pass copy​ [EP]

Form V39 A​