Official Sources

Where VisaStay's visa, tax-residency, and pre-arrival data comes from — last reviewed Aug 2026.

VisaStay is an independent app. It is not affiliated with, endorsed by, or operated by any government or immigration authority. Visa and immigration rules can change without notice. Always confirm your specific situation on the official government source(s) linked below, or with a licensed immigration professional, before making travel decisions.

Visa & entry rules — official immigration sources

DestinationOfficial source
Thailandimmigration.go.th, thaievisa.go.th (MFA), TDAC: tdac.immigration.go.th
Indonesiaimigrasi.go.id, evisa.imigrasi.go.id, arrival card: allindonesia.imigrasi.go.id
Vietnamimmigration.gov.vn (Immigration Dept e-visa portal)
Malaysiaimi.gov.my, MDAC: imigresen-online.imi.gov.my/mdac
Singaporeica.gov.sg, arrival card: ica.gov.sg/sg-arrival-card
Japanmofa.go.jp/j_info/visit/visa, Visit Japan Web: digital.go.jp/visit_japan_web
South Koreaimmigration.go.kr, K-ETA: k-eta.go.kr, e-Arrival: e-arrivalcard.go.kr
Georgiamigration.commission.ge, geoconsul.gov.ge (MFA)
Turkeymfa.gov.tr/visa-information-for-foreigners, evisa.gov.tr
Mexicogob.mx/inm (INM)
Albaniapunetejashtme.gov.al (MFA), e-albania.al
United Arab Emiratesicp.gov.ae, gdrfad.gov.ae (Dubai)
EU / Schengen areahome-affairs.ec.europa.eu, travel-europe.europa.eu (ETIAS + EES)
United Kingdomgov.uk/check-uk-visa, UK ETA: gov.uk ETA guidance
United Statestravel.state.gov, ESTA: esta.cbp.dhs.gov
Canadacanada.ca — Immigration, Refugees and Citizenship
Australiaimmi.homeaffairs.gov.au (ETA/eVisitor)
New Zealandimmigration.govt.nz, NZeTA/NZTD: travellerdeclaration.govt.nz
Indiaindianvisaonline.gov.in
Sri Lankaeta.gov.lk
Cambodiaevisa.gov.kh, e-Arrival: arrival.gov.kh
Brazilgov.br/mre
Argentina / Chile / Peru / Colombiaargentina.gob.ar/migraciones · serviciomigraciones.cl · migraciones.gob.pe · cancilleria.gov.co
South Africadha.gov.za
Kenya / Tanzaniaetakenya.go.ke (Kenya eTA) · foreign.go.tz (Tanzania immigration)
Morocco / Egyptmre.gov.ma (consular e-services) · visa2egypt.gov.eg

For any destination not listed above, VisaStay's data is verified against that country's national immigration authority or Ministry of Foreign Affairs visa page, with embassy sites as a fallback. Reach out to privacy@headfirstservices.com if you'd like the specific source for a country not shown here.

Tax residency thresholds

SourceUse
OECD — Rules governing tax residenceCanonical per-country residency criteria
National revenue authoritiese.g. rd.go.th (Thailand), hasil.gov.my (Malaysia), irs.gov (US Substantial Presence), gov.uk (UK Statutory Residence Test)

Tax residency rules often involve more than a simple day count (ties, domicile, split-year and lookback provisions). VisaStay's in-app alerts track the day-count trigger only — always confirm with a licensed tax professional before making a residency decision.

Pre-arrival registration systems

SystemDestinationOfficial source
TDACThailandtdac.immigration.go.th
MDACMalaysiaimigresen-online.imi.gov.my/mdac
SG Arrival CardSingaporeica.gov.sg/sg-arrival-card
All Indonesia Arrival CardIndonesiaallindonesia.imigrasi.go.id
e-ArrivalCambodiaarrival.gov.kh
e-Arrival CardSouth Koreae-arrivalcard.go.kr
ESTAUnited Statesesta.cbp.dhs.gov
eTACanadacanada.ca (IRCC)
ETAUnited Kingdomgov.uk ETA
ETA / eVisitorAustraliaimmi.homeaffairs.gov.au
NZeTA + NZTDNew Zealandimmigration.govt.nz + travellerdeclaration.govt.nz
ETIAS + EESEU / Schengen areatravel-europe.europa.eu
K-ETA (suspended until 2027)South Koreak-eta.go.kr
Kenya eTAKenyaetakenya.go.ke
e-Visa / ETASri Lankaeta.gov.lk