How I can refactor this method to remove the nested if else and reduce complexity

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Java

private void compareSignPostInfos(final Collection<feature<? extends="" geometry="">> allSignpost,
        final Collection<feature<? extends="" geometry="">> allSignpostFromRE, final Attribute<nonspatialobject> baseSignInfo,
        NameType nameType, Attribute<nonspatialobject> name, Attribute<nonspatialobject> exitNumber,
        DictionaryRangeItem pictogram) {

        boolean matchFound = false;
        final StringBuilder destinationInfo = new StringBuilder();
        Attribute<nonspatialobject> comparedSignInfo = null;
        List<feature<? extends="" geometry="">> listOfComparedSignposts = GenericFactory.newList();
        for (final Feature currentSignpost : allSignpost) {

            final List<attribute<nonspatialobject>> compareSignInfoList = new ArrayList<>();
            if (allSignpostFromRE.contains(currentSignpost)) {
                compareSignInfoList.addAll(getSingpostInfoList(currentSignpost));

                for (final Attribute<nonspatialobject> currSignInfo : compareSignInfoList) {

                    if (isIdenticalExitNumber(exitNumber, destinationInfo, currSignInfo)
                        || isIdenticalNames(name, nameType, destinationInfo, currSignInfo)) {
                        comparedSignInfo = currSignInfo;
                        if (isAmbigous(currSignInfo)) {
                            matchFound = true;
                        }
                    } else if (isIdenticalPictogram(nameType, pictogram, destinationInfo, currSignInfo)) {
                        comparedSignInfo = currSignInfo;
                        matchFound = checkForException(compareSignInfoList, baseSignInfo, matchFound, currSignInfo);
                    }
                }
                if (!matchFound) {
                    listOfComparedSignposts.add(currentSignpost);
                } else {
                    break;
                }

            }
        }
        
        getVivaMsgAndLogViolations(baseSignInfo, exitNumber, name, nameType,matchFound, pictogram, destinationInfo,
            comparedSignInfo, listOfComparedSignposts);
       
    }

What I have tried:

I have tried creating a method. but unable to do that cause i need to return
variable comparedSignInfo and mathfound.