20. Is there a limit on the amount a candidate can contribute to their own election campaign?

Turkish Political Parties Law, Electoral Law, Law on Presidential Elections.

Turkish Political Parties Law  https://www.mevzuat.gov.tr/mevzuat?MevzuatNo=2820&MevzuatTur=1&MevzuatTertip=5  Law on Elections https://www.mevzuat.gov.tr/mevzuat?MevzuatNo=298&MevzuatTur=1&MevzuatTertip=4 The Law on presidential Elections ( https://www.mevzuat.gov.tr/mevzuat?MevzuatNo=6271&MevzuatTur=1&MevzuatTertip=5 )

Both political parties law, law on presidential elections, electoral law does not contain any specific provision on this.