Some signs that your Ramadan is accepted:

*Thread*

The first sign can be found in the statement of Allah in The Qur'an - 19:76
"Allah gives an increase in guidance to those who are guided" . This verse contains the secret as to whether your deeds have been accepted or not.

If you conclude your deeds and then you are given an ability to continue and do another good deed after that, then it is a sign that your deeds have been accepted. Similarly, after Ramadan, if the day of Eid is a day of obedience, a day where you still pray your Qiyam-al-Layl,

... a day where you still pray (in Masjid) five times a day, a day where you still read The Qur'an; then this is a huge sign that Allah accepted your Qiyam and good deeds in Ramadan. If however the day of Eid is a disobedience to Allah, where you stop praying,

You turn away from The Qur'an, then this is a sign [not a guarantee] that perhaps there was something flawed in the way that you performed those deeds in Ramadan. So, ultimately it's all about preparing for what is going to come- Ramadan was a training program, it had a purpose.

Allah told us the purpose in The Qur'an (2:183) – “Oh you who believe, fasting has been made obligatory for you as it was obligatory for those before you, SO THAT YOU MAY ACHIEVE TAQWA” — Taqwa is piety; fear of Lord— Become more obedient and less disobedient. So, look at Eid day

If you became more obedient to Allah, then you got something out of this Ramadan and if not, then this is a sign that Ramadan didn't have the desired effect over you. We need to turn in repentance that Allah accepts our good deeds & replace those bad deeds with goods ones...

Also, one of the key purposes coming out of Ramadan is showing gratitude for what Allah gave us in Ramadan and notice that gratitude is mentioned with regards to Eid. Show gratitude to Allah by using what He has given you to please him & to come near to Him in obedience.

Show gratitude not just by words but by the actions that you do. Pray five times a day, read Qur'an, do voluntary fasts, ask for His forgiveness, you continue to give Sadaqah & charity to poor & needy, you do not waste food, avoid overeating— this is showing gratitude for what...

...Allah has given you in the month of Ramadan. May Allah accept our fasting and our standing in prayer and our reciting of Qur'an and accept all our good deeds that we have done in Ramadan. Allahum-Mag'firlī