Yes, it is possible in Jainism — but it is not guaranteed.

In Digambara Jainism, a soul goes to heaven only if punya karma (meritorious karma) is stronger than papa karma at the time of death. If a person has done sinful actions in the past, including strong attachment, lust, or misconduct, that can create heavy papa karma and reduce the chance of heavenly birth.

So the correct Jain answer is:

• Yes, heaven is possible
• But past sins can make it difficult
• No one can say with certainty for an ordinary person

What matters now is to:

• stop the wrong conduct,
• do pratikraman sincerely,
• practice self-restraint,
• reduce kashayas like lust, anger, pride, and greed,
• and live as a true shravika with purity and discipline.

In Jainism, the goal is even higher than heaven: moksha, the liberation of the soul.

If you want, I can also explain this in simple Digambara Jain language with the difference between heaven, punya, and moksha.