In Jain Dharma, tapas means austerity or spiritual discipline done to burn karma. If you mean “Upadhān Tap”, then it is one special austerity, and there are many other types of tap in Jainism.

Main 12 types of tapas

These are divided into 6 external and 6 internal tapas.

1) External tapas

1. Anshan – complete fasting
2. Unodari – eating less than hunger
3. Vritti-sankshep – limiting food, place, or things used
4. Rasa-parityag – giving up tasty foods
5. Kayaklesha – bodily hardship for spiritual purification
6. Sanjam / Samlinata – withdrawing and staying disciplined

2) Internal tapas

1. Prayashchitta – repentance and atonement
2. Vinay – humility and reverence
3. Vaiyavach – सेवा / selfless service
4. Swadhyay – scriptural study
5. Dhyan – meditation
6. Vyutsarga – letting go, detachment of body and ego

Other well-known Jain taps

Besides these, people also commonly refer to specific vows or austerities such as:

• Aayambil
• Ekasan
• Biyasan
• Chauvihar fasting
• Masakshaman
• Varshitap
• Navkarsi / Porasi / Purimaddha / Avaddha
• Upadhān Tap

About Upadhān Tap

Upadhān Tap is a very disciplined Jain austerity, usually done with:

• strict diet rules
• repentance and purity
• regular worship and meditation
• vrata and self-restraint

It is especially respected in Jain tradition as a powerful means of purification and devotion.

If you want, I can also give a simple list of all Jain tapas in Gujarati or Hindi style.