By Giuseppe Fonte ROME (Reuters) -Poste Italiane holds less than 10% of the 2.3 billion euros ($2.6 billion) in tax credits offered for building refurbishment that have been frozen by Italy’s tax police, a document presented to parliament and seen by Reuters showed. In an attempt to ease fears over its level of exposure, Poste said in the document that less than 3% of the tax credits it had bought had been seized, against a 7% average for other financial institutions involved. Under a popular scheme introduced in 2020, the Italian government pays an eye-watering 110% of the cost of turning bui…